"These researchers have an association that they've picked up on, but it's a weak association," said Steve Shoptaw, a professor in the department of family medicine and psychiatry at UCLA. "Marijuana tends to be one of those firebrand issues were people can make statements to get airtime, so I'd like to see these findings replicated."

"Without stronger proof, critics say the study should be taken with a grain of salt."

"Certainly we're going to continue forward with this," she added.

"The bottom line is that I would not start warning my marijuana smokers that they are going to get testicular cancer," he said
http://www.cnn.com/2009/HEALTH/02/09/health.pot.cancer/index.html?=141